中南大学学报（自然科学版）2012，Vol.43Issue(6)：2403-2412,10.
定日镜群风荷载干扰效应的数值模拟
Numerical simulation of heliostat group's wind load interference effects
摘要
Abstract
Heliostat usually appears in group. When air current passes, and there will emerge interference effect between individuals and further influences their wind pressure distribution as well as flow field features. In order to study this kind of interference effect, a numerical wind runnel model was established, and corresponding UDF program was drafted, and entry conditions of atmospheric boundary layer's wind field was simulated with terrain roughness of category B. Interference effects of two and four heliostats were computed by radial disposition on their disadvantageous, common and suspending operating modes using standard k-ε model simulation. The wind power interference factors were calculated, and the flow field distribution map was drafted. The impacts on heliostat surface wind pressure of factors such as different operating modes and distances, dispositions were analyzed. The mixed grid was selected to enforce the interior unstructured grids to transform to exterior structured ones. The size function in Gambit software was used to reduce calculation while the grid precision was ensured. The results show that wherein heliostats by radial disposition, the rear heliostat locates in the front heliostat's wake area, the surface wind pressure reduction is obvious, and the operating mode of elevation angle 0° is the most sensitive to space influence. Due to the front side interference, the surface wind pressure of heliostats by radial disposition increases.关键词
定日镜群/数值模拟/干扰效应/流场特性/风力系数Key words
heliostat group/numerical simulation/interference effects/flow field features/wind factor分类
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王莺歌,李正农,卢春玲..定日镜群风荷载干扰效应的数值模拟[J].中南大学学报（自然科学版）,2012,43(6):2403-2412,10.基金项目
国家自然科学基金资助项目(50978094) （50978094）
梅州市自然科学基金资助项目(2009KJ24) （2009KJ24）
